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Moon

The Earth's only natural satellite. The moon has a cold, dry orb covered with many lunar craters and strewn with rocks and dust. The moon has no atmosphere. But recent lunar missions have found plenty frozen water on the moon.

Contributors in Moon

Moon

terminator

Astronomy; Moon

The line which delimits night (shadowed portion) and day (sunlit portion) on a celestial body. The Moon's phases illustrate this.

super moon

Astronomy; Moon

The largest and brightest full moon of the year, caused by the Moon's oval orbit of the Earth. The point where the moon is at perigee and appears to be 14% larger, as it is 50km closer to the Earth ...

Phobos

Astronomy; Moon

One of the two moons of the planet Mars. Of all the known moons in the solar system, the moon Phobos orbits closest to its primary, hovering only a few thousand miles above the surface. Its ...

Deimos

Astronomy; Moon

The smaller of Mars' two moons. Being only 15 by 12 by 11 km in size, Deimos whirls around Mars every 30 hours.

tidal locking

Astronomy; Moon

Also known as synchronous rotation, tidal locking is when an orbiting satellite's rotational period is the same as it's orbiting period. As a result, one hemisphere is always facing the object being ...

synchronous orbit

Astronomy; Moon

An orbit in which the orbiting satellite's period is the same as the rotational period of the object being orbited around. An example of such an orbit is Pluto's moon Charon. Artificial satellites ...

rotation of the moon

Astronomy; Moon

The same side of the Moon always faces the earth. The moon's rotation period id synchronous with its revolution period around he Earth.

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